Leather-skiving machine.



A. M. ALEXANDER. LEATHER SKIVING MACHINE.

APPLICATION FILED NOV. 8, 1909.

Patented Nov. 25, 1913.

6 SHEETS-SHEET 2.

KZNWG A. M. ALEXANDER.

LEATHER SKIVING MACHINE.

APPLICATION FILED NOV. 6, 1909.

3 SHEETSSHEET 3.

29 M566 I 1 I fia/azzzar A. M. ALEXANDER.

LEATHER SKIVING- MACHINE.

APPLICATION FILED NOV,8,1909,

Patented Nov. 25, 1913.

6 SHEETS-SHEET 4.

mzea'sea' f6. )7? @XM I A. M. ALEXANDER.

LEATHER SKIVING MACHINE.

APPLICATION rnmn NOV. 8, 1909.

Patented NOV. 25, 1913.

d SHEETSSHEET 5.

A. M. ALEXANDER.

LEATHER SKIVING MAGHINE.

APPLICATION FILED NOV. 8, 1909.

1,079,462, Patented Nov. 25, 1913.

6 SHEETS-SHEET 8.

Z iaveilfar UNITED STATES PATENT OFFICE.

ALEXANDER M. ALEXANDER, OF BEVERLY, MASSACHUSETTS, ASSIGNQR TO UNITEDSHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEWJERSEY.

LEATHER-SKIVI'NG MACHINE.

Specification of Letters Patent.

Patented Nov. 25. 1913.

To all whom it may concern:

Be it known that I, ALEXANDER M. ALEX- ANDER, a citizen of the UnitedStates, residing at Beverly, in the county of Essex'and State ofMassachusetts, have invented certain new and useful Improvements inLeather-Skiving Machines; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

The invention relates to leather skiving machines, and more particularlyto machines adapted to skive the edges of upper leather or leather of asimilar character.

The invent-ion is intended primarily as an improvement in the machineshown and described in the application of George E. \Varren, Serial No.481,117, filed March 3, 1909, although not confined in its applicationto such'machine.

The object of-the' invention is to simplify and improve the constructionand arrangement of various parts of a machine of this type whereby itsoperation is rendered more certain and reliable, and whereb the variousadjustments requisite for enab 'ng the machine to operate properly indoing various classes of work may be readily and conveniently effected.

To these ends the invention contemplates the provision in a machineprovided with a cylindrical knife and a feed roll arranged within theknife to cotiperate with a. presser foot without the knife in resentingand feeding the material to the nife, of novel and improved means forvarying the action of the knife upon the material in accordance with thecharacter of the work being performed; the provision of novel andimproved mechanlsm forso supporting the feed roll that it mayautomatical y accommodate self to variations in the position of theresser foot or variations in the thickness of the material bein actedupon; the provision of novel an improved means for supporting andad'usting the grinder disk by which the cylin rical knife is sharpened;

the provision of-novel and improved means for adjusting the knifelongitudinally to bring it into proper relation to the feed roll andpresser foot and for firmly retaining the' knife in adjusted position;and the provision of novel and improved means for removing long stripsof skiving from the i interior of the skiving knife.

The invention also contemplates the provision of certain furtherfeatures and combinations, the advantages of which will be obvious tothose skilled in the art.

The various features of the invention will be understood from theaccompanying drawings and the following detailed description of themachine shown therein.

In the drawings Figure 1 is a side elevation of a machine embodying thevarious features of the invention in their preferred forms; Fig. 2 is aplan view of the machine; Fig. 3 is a front end view with the frontplate removed; Fig 4 is a rear end view; Fig. 5 is a verticallongitudinal section through the axis of the cutter disk; F ig. 6 is avertical transverse section on line 6-4), Fig. 2; Figs. 7 to 13inclusive are detail views of the mechanism for supporting the feedroll; Fig. 14 is a plan view partly in section showing the means fordriving the feed roll; F ig. 15 is a detail plan view of the devices forsupporting and adjusting the grinder disk; Fig. 16 is an elevation ofsectional view on line 17-17, Fig. 16; and Fig. 18 is a sectional viewon line 1S--18,

Fig. 15.

'80 the devices shown in Fig. 15; Fig. 17 is a is provided with a cyindrical knife 34% mounted within the casing 1 and projecting up throughan opening in the table 2 into position to act upon the material. Thematerial to be skived is presented and fed to the knife 3 by a feed roll4 arranged within the knife and cooperating with a presser foot 5arranged without the knife. The periphery of the feed roll is curvedlongitudinally to correspond to the curvature of the knife edge, and theengaging face of the presser foot 5 is concave, the curvature of itssurface correspondin to the curvature of the knife edge. An ad uStableside gage 6 is provided for guiding the edge of the material as it isfed to the knife.

The presser foot is carried by a block 7 mounted to slide vertically inguideways formed in the'end of an overhanging arm 8. The block 7 is suported by a spring9 which underlies the ead of a stud 10 to the lowerend of which the block is secured. The adjusting screw 11 engages theupper end of the stud 10, and by manipulating this screw the verticalosition of the presser foot with relation to t e knife may be readilyand conveniently adjusted. In order that the angle of the bevel formedat the edge of the material by the skiving knife may be varied-asdesired, the presser foot is so mounted that it may be adjustedlaterally as well as vertically. When the lateral adjustment of thepresser foot is such that the concave surface of the foot is concentricwith the knife, the knife will act along the line parallel to thesurface of the presser foot, and when so adjusted the machine may beused for splitting strips of leather or reducing such strips to auniform thickness. If it is desired to bevel the edge of the leatheracted upon, then the presser foot is adjusted laterally toward the rightin Fig. 3, and is adjusted vertically if necessary to bring the surfaceof the presser foot at the left side into a plane tan ent to the cuttingedge of the cutter. Wlth the presser foot thus adjusted the knife willact to bevel the edge of the material fed between the feed roll andpresser foot, and the angle of the bevel will depend upon the lateraladjustment of the presser foot. In order that a wide variation in theangle of the bevel cut by the knife may be secured, it is preferred toso mount the presser foot that its lateraladjustment is in a lineinclined toward the knife in the direction of its travel. That is tosay, the presser foot is so mounted that when it is adjusted toward theright or in a direction opposite to the travel of the knife it movesaway from the knife, and when adjusted toward the left or in thedirection of travel of the knife, it moves toward the knife. By thusmounting the presser foot to move laterally in an inclined line thedistance between the surface of the presser foot and the knife at theright side of the presser foot rapidly increases as the presser foot isadjusted toward the right while the relation between the surface of thepresser foot and the knife at the left side of the resser foot remainssubstantially unchanged The presser foot may therefore be readilyadjusted to secure either a gradual or an abrupt bevel. Provision forconveniently securing this ad justment of the presser foot is made bymounting the presser foot in a laterally 1nclined guideway formed in thelower end of the block 7, and securing the presser foot in adjustedposition by means of a spring pressed locking pin 12, the inner end ofwhich is arranged to engage any one of a series of notches 13 in theback of the presser foot.

The presser foot when adjusted is held in fixed position, and thematerial should be forced firmly and uniformly against the lower surfaceof the presser foot b the feed roll 4. In order that the feed rol maythus support the material, re ardless of variations inthe thickness ofthe material being operated upon, and of variations in the adjustment ofthe presser foot, mechanism is provided for so supporting the feed rollthat it may tip to change its angle with relation to the presser footand skivin knife, and may move bodily toward an from the presser foot.As shown, the feed roll is mounted upon a stud 14 projectin from a block15 which is pivotally mounte upon the end of a supportmg lever 16. Thepivot pin 17 upon which the block 15 is mounted is so arranged that itsaxis is in a plane at right angles to the axis of the feed roll.Movement of the block 15 about the pivot in 17 therefore causes a tiping of the r01 7 to vary its angle with relation to the presser foot inaccordance with the variations in the thickness of material, or tochange its angle with relation to the skiving knife in accordance withthe adjustment of the presser foot. The normal position of the feed rollis determined by two 00 operating stops on the block 15 and lever 16respectively, which are held in engagement by a torsional spring 18which surrounds the pivot pin 17 and connects the block and lever. Asshown,

and projecting into position to enga e the side 20 of the lever 16(Figs. 7 and 8 The lever 16 is pivotally mounted upon a supporting rod21, the axis of which is substantially parallel to the axis of the feedroll and in a plane at right angles to the axis of the knife. Movementof the lever about the rod 21 therefore moves the feed roll bodilytoward or away from the knife and presser foot. The normal position ofthe lever is determined by a lug 22 projecting laterally from the leverand arranged tp engage the end 23 of a slot 24 which is formed in acollar 25 secured to the shaft 21. The end 23 of the slot and the lug 22thus form a fixed abutment and stop for determining the normal positionof the roll supporting lever. The lever is supported in normal positionby a torsional spring 26 which surrounds the hub 25 of the collar 25 andis connected with the lever and collar. In order that the force withwhich the feed roll is pressed against the material may be readilyvaried in accordance with the character of the material being operatedthe cooperating stops consist of a plate l9'secured to the block 15upoh, means "'is .pr0vided for varying the tension on" the torsionalspring 26. In the construction shown this} means comprises a sleeve 21to .which' the end of the spring .26 is secured. This sleeve is-mountedupon arrows; Figs. 11 and 12, the ratchet 27 riding over the teeth 29.and retairiingtlie collar in its-adjusted position. When it is desiredto decrease-the ten'sionfon-the spring, the pawl 28 maybe'rea'dilyfdisengaged from the ratchet, 29 and turhed-" in -theopposite direction, the pawl being reengaged' with theratchet when theproper adjustment is secured? 'A second .sprihg '3l' may interposed"between the l.ug 22 ahd tlie"end*"of the slot 24 to assist insupportingithe feed roll and holding it yielding ly in'wnormal position.'case'it is lesired t'o.movethe feed roll. bodily away from'the 'presserfoot or knife. this'may be readilyv done by means of' aliaiidle'32'projecting from the lever16.

In order that the knife3fnia'y be readily sharpened "as occasioh mayrequire' the m'aarmj by gmea'ns f of screws '38 passin-gffthrough' "Anadjusting screw 'd" ly} and: conve'nie'ntly I r on the arm] a; h i whelongitudinally of ,th.e jkni'fe: in:i accordan'cev adjusting. tliislidup chine is provided 'witli' a 'gr'inding-disk .33. This 'diskisjcarried byga slide 34;: which secured-upon an arm .oijlever 35; Theslide. is gu ide d .upon' the arm 235. by a lug. 36 which. projectsthrough a slot. 37' formed in the "slide, tlie-hslide: is; held upon theslots in t he slide. 40 is providedfor r vary the. position:

Jdesired 'to' give with the hevelf whiehv is mounted the knife icdP'Ihe:

upjoncente'rs 5i1 'so thatjthej end carrying;

the gririrllingfwheel may-be r novedv toward and from the l, ni, fe 3.."-Inio'rderthat thearm-3:; may'lie' readily manipulatedto bring 'the-grir'id-i'ng disk ;-into and out offengagemerit with the knife; a-li'nk42 is j'co nr ected with the front-.end'uof the. arm andus -extendedthrough an opening in the side of tl casirig 1. A-s pring4r3 isinterposed liearinfi? toward .the cutter, The outer end gg' a b a nutfizp ovid'ed withalrnurled- .Tlie -nut is held-in position .by. a plate46,,the :up'per end-of which bitween ajshoulder on .the link and theinner.- side" of the casing, and tends'toforce the of' the link 43;SereW threaded-andis enhead 4:).-

furca ted an engages a-n annular groove- 47 in the nutf V Thecylindrical'knife 8 1ssecured upon 1 positionalso serves to'lock theshaft 56 against r0;- 105- j tation so that manipulation .of.the-knurled head 57 Z is prevented-L." l l. henv the nut "60fiisfthe,skivi'ng knife removes a long c the end of a shaft 48 which is mountedin and presser oot as it is ground away, the

bearing sleeve 49 is mounted so that it may be moved longitudinally, andthe rear end of the shaft 48 is connected by a telescoping coupling 50with a driving shaft 51. In the construction shown the sleeve 49 ismounted tomove longitudinallj in a split bearing 52 formed in a frame 53which is supported within the casing 1, andis also providedwith bearingsfor the shaft '51. In order that the sleeve may be conveniently adjustedlongitudinally it is providedwith a rack 54 arranged to be engaged byapinion 55"formed on a transverse rod or shaft 56. The shaft 56':isextended out through thesicle of the casing and is provided at its outerend with .a knurled head 57 by which it'r'n'ay be readily rotated ineffecting the longitudinal adjustmentof the knife shaft 48. F or" thes'ake of simplicityfthe rodor shaft 56 is also utilized as the means foroperating the split bearing 52 to clamp and release 5 the bearing sleeve49.. shown the inner end of the shaft 56 is provided with a nutandwasher'58arranged to engage the inner side of the bearing 52; and theshaft is also provided with afscrew-g threaded portion 59 at the pointwhere -it pr'ojectsbeyond the casing 1. A nut .60 engagesthescrew-threaded portion 59 and is arranged 'tobear againstja face 61onthe side of the casing. :By .serewingup} the 1'00 nut 60, the rod56.maybe operated to contract the split bearing52'and thus clamp thebearing sleeve 49.'firrnlyi'n adjusted I The tightening of the screw 60screwed away from the faceifili the bearing .52 is released so thatthezfsleeve-el9q i may be adjusted loi'i'git'udiniil-l'y',z' '-and the'110 shaft 56' is also unelamp ed sof thatY-it'fm'ay be turned to adjustthesleeve'longitudinsflly .'.In operating upon some classes: work ousskiving orfstrip from.the in'aterlaljahd' in such case thisstrip isliable fiche-engaged by the edge of the knif'ej and'f to be carried.-

u p and 'wourid around the feed :roll or'lotli'erwise interfere with theproper operatiofl-p'f the machine. In order to avoid chine is provided 4with-a deflector plate 62' arranged in front of-land f'projecting -1nto.the knife into :close proximity to its inner surface beyond the cutting'.poiiit.'-.:'. The;plate is dished or curved so that the skiv ngnf-125. moved by the cutter isengaged by the'pl'a'te and directed outaway from its edgeI'Thedeflector plate is preferably :to a

' ley 73 'secured to the 'driving'shaft,'over bracket 63extending'forwa'rd from-the front end of the frame 53 so that it'may bereadily removed in case thema'chine is to be used, upon a class of workwhich results in the- 6 removal of short skivings or chips.

. The feed roll 4 is driven-through a'shaft v64, the inner endof .which.isconnected through a universal joint withone endof a shaft-65, and theotherend of .which is connected through a universaljoint to the roll.The shaft 64 is providedwith aJvorm wheel 66 which 'is engaged by a:worm '67 (Fig. 15) secured toone end of a shaft 68, the other end ofwhich carriesfa pulley 69. The'sh'aft 68 is driven fromthedriving shaft51 through a belt 'I'O'W'hich' over the pulley 69 and over a pulley lsecured to the driving shaft. The grinding wheel is driven fromthedrivingshaft 51, throughja' belt 72. which p'a'ssesmver apulidler'pulleys 74, and about a pulley secured -tothe grinding disk shaft. '-Theidler pulleys-74 are mounted upon a-swin'ging .arm 76 which maybeadjusted through alever '17, to keep thebelt'tight under the'vari-' rous adjustments-of the grinding disks While itis preferredto employ thespecific construction and arrangement of parts shown and described, itwill be understoodthzitthis construction and arrangement isnot essentialexcept so'fargasspecifidin the claims, and may be varied and-modifiedwithout departing from the invention. Having explained the nature= and"object of the inventi'on, and specifically described bneformjof machinein which it maybe embodied, what I cla-irnais'z f 1.:A. leather'skivingmachine-, having-,'i i-n 1 combination, tar-cylindricalknife,a'*feed roll within theknife, and a .conca-vefiir'edfpresserY footwithout the knife the: 'o'lsit-ion' i'w'hichi ,determines'thezbevel cutavin' provision for',-lateral-.adj ustrnent to"vary- -the'fb'evet=cut I2,- A leatherskiving r'nac lii-ne,- havng, in coxnbination acylindricalknife, a. feed-roll.- l .W'ithinlhe knifehavingi'ts-periphery curved longitudinallyto correspondf-to th' ciirva--ture of the lmifeya'nd a-fixedpresserfoot f the. osit-ion o f'whichdete-rmines thef beve'l cut aving an engaging-face curved weararespond'to the-"'curvature of theakn'ife-and havin provision for lateraladjustment-to J vary tie bevel cut by the knife,- substantially 3;.leather 'skiv'in'g 'machine;*having,'- inv combination," a cylindricalknife, "a ';feedgioll within thelrnifeflindf a concave presser-footlui'ving: provisionffi'for adjustment laterally infli line}. iric linedtoward the=knife in the di "rectfon I of. "travel,- substantially I asdef-' scribed. I

4. A leather skivlng machine, h8V'1I1g,"lI1

angle of the roll with relation to the Presser foot and knife,-cooperating stops on the 1 .1 ver and block, and a spring-forholding thestops in engagement; substantially as de-' the lever, substantiallyas'described. v

roll .is mounted,.-'a;':lever inounted to turnaboutf-anaxisjparalleh'tol-thezaxis of. the g Tell; a pivotal. connection" betweenthe block and lever the -axis ofwhich'is located in' a planeatrightmn'gls to the axis of the roll, a; tor'sional spring connectingthe lever and block, andcoop'eralting s'tops{on'- the block .tially asdescribed.

combination, a cylindrieal knife, a fixed '65 presser foot having aconcave engaging su'rface and having provision for lateral ad justment'to vary the bevel cut by the knife, 5 and a feed roll Within the knifehaving its peripherycurved longitudinally to, correspond to thecurvature of the pres'ser foot, and mountedto yield angularly' andbodily toward and away from the presser'foot, substantially asdescribed. F

- 5. A leather skiving machine, having, in combination, a knife, apresserv foot, a cooperating feed roll, a block on which the roll ismounted, a spring supported lever onwhich the block'is pivotedto tipto'vary the scribed. 6: A leather skiv-ingfniachineg having, in

combination, a knife, a 'pres'sejrfoot," a cooperating fee'droll, abldckon-which the rollis-mounted pivotally supported to tip about an axislocated in a -planeat right angles to the axisof the"roll,j a*lever onwhich the block is -p'ivoted supported to turn about an axis locatedin aplane at right angles to the axis of the knife, a spring be tween thelever and block' for, yieldingly supporting the roll,.-an d-.a; springsupporting .7. A leather'skivingfmachine, having, in

' combination, :0." knife, a presse'r' foot," 9. co-

operating "feed Troll," a block on "which the :andlever heldin-engajgirgentbyisaidspring,

substantially. as descri h y-the knif substantiallyfa's described.\combinatiom-a knife, a presserfoot,-. a cooperating feed roll,,a leveron which the 18.;A leather skim-gramme, having, in:

roll is yieldingly mounted to tip to changes} itsiangle with relationto-the 'presser "foot and knife, a torsional springgacting onthe.lcver.to'supportthe*rol l, and means for varying the tension of thespring, substan- "'9. A- leatherskiviiigqnach' 'e,,havi"ng,combination,- a knife, "a press er foot, a 00- operatingfeed'roll f'a-leye'r' on which the roll is y eldi'nglymounted" to tipf-to change:

1 its angle :with' relation to itl1 e:-flpresser footfund'knife,-a-torsionitls" H 5 the lever hav'in'g" one end coiinetted It I lever, a sleeve connected to the other n of the spring, and means.for adjushngthe sleeve to vary the tension on the spring,

substantially as describedl shaft, a bearin 10. A leather skivingmachine, having, in con'ibination, a knife, a presser foot, a 00-operating feed roll, a lever on which the roll is mounted, a torsionalspring having one end connected to the feed roll lever, a sleeveconnected to the other end of the spring, a pawl carried by the sleeve,and a ratchet engaged by the pawl to hold the sleeve in adjustedposition, substantially as described.

11. A leather skiving machine, having, in combination, a presser foot, afeed roll, a longitudinally movable sleeve provided with a rack, a shaftjournaled in the sleeve, a knife mounted on the shaft, a split bearingfor the sleeve, a clamping rod for operating the bearing to clamp andrelease the sleeve provided with a pinion for engaging the rack on thesleeve, substantially as described.

12. A leather skiving machine, having, in combination, a presser foot, afeedroll, a longitudinally'movable sleeve, a shaft journaled in thesleeve, a knife mounted on the for the sleeve, and means for adjusting te sleeve longitudinally and for clamping the sleeve in the bearing,substantially as described.

13. A leather skiving machine, having, in

combination, a presser foot, a feed roll, a longitudinally movablesleeve, a shaft journaled in the sleeve, a knife mounted on the shaft, asplit bearing for the sleeve, and a device for adjusting the sleeve andcontracting and releasing the bearing, substantially as described.

14:. A leather skiving machine, having, in combination, a presser foot,a feed roll, a longitudinally movable sleeve provided with a rack, ashaft journaled in the sleeve, a knife mounted on the shaft, a splitbearing for the sleeve, a clamping rod for contracting and releasing thebearing, and a pinion on the rod engaging the rack on the sleeve,substantially as described.

15. A leather skiving machine, having, in combination, a cylindricalknife, an arm movable toward and away from the periphery of the knife, aslide mounted on the arm for movement longitudinally of the knife, anadjusting screw for moving the slide, and a gi'inding disk mounted onthe slide, substantially as described.

ALEXANDER M. ALEXANDER.

Witnesses WARREN G. OGDEN,

N. D. MCPHAIL.

copiel of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

